The definition of Diphenyl ether:
In caustic soda solution, chlorobenzene and phenol are condensed by copper as catalyst. The combination of potassium hydroxide, phenol and chlorobenzene in molar ratio is 1:1. After the reaction, the diphenyl ether was separated by acid treatment and diphenyl ether was obtained. Chlorobenzene and phenol can also be reacted in sodium hydroxide solution. Another industrial source of diphenyl ether is a byproduct of hydrolyzed phenol as chlorobenzene. About 10% of chlorobenzene is converted into diphenyl ether with sodium hydroxide in the process of hydrolysis, and some processes can reach 20%. By extraction of refined diphenyl ether products.
The use of Diphenyl ether:
It is mainly used as one of the components of high temperature heat load. A mixture of diphenyl ether and biphenyl is produced by A mixture of 73.5:26.5. Temperature range of use: gas phase 232-399 ℃, liquid 21-399 ℃, temperature is not more than 400 ℃. From the mixture of biphenyl and diphenyl ether said dowtherm LF, low freezing point, still can be used in - 30 ℃, is a low temperature, low viscosity heating medium. Diphenyl ether has the aroma of leaves and begonia, as well as sweet orange and daffodils, known in the spice industry as crystal germinal oil or artificial leaf oil. Since diphenyl ether is more stable to alkalinity, it is used to blend the essence of soap, and also used the substitute of fragrant leaf oil, which is suitable for the dressing of flower fragrance, deodorant etc. As an organic synthesis intermediate, this product is used for spice industry, synthetic resin and other organic synthesis production.
Used in the formulation of daily flavouring essence and the preparation of artificial leaf oil. Due to the coarse aroma of diphenyl ether, a large amount of diphenyl ether is mainly used in low-grade soaps and synthetic detergents used in flavor and other products. The substitute of low grade balsam oil. Suitable for the use of fragrant cosmetics, soap and deodorant.
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